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Autogenous Deformation of Alkali-Activated Blast Furnace Slag Concrete Subjected to Variable Curing Temperatures
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och brand.ORCID-id: 0000-0002-2922-5815
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och brand.
Skanska Sverige AB, SE-405 18 Gothenburg, Sweden.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och brand.ORCID-id: 0000-0001-6287-2240
2019 (engelsk)Inngår i: Advances in Civil Engineering / Hindawi, ISSN 1687-8086, E-ISSN 1687-8094, Vol. 2019, artikkel-id 6903725Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Deformations of alkali-activated slag concrete (AASC) with high MgO and Al2O3 content, subjected to variable curing temperature were studied. Sodium silicate and sodium carbonate were used as alkali activators. The obtained results showed development of deformations consisting of both shrinkage and expansion. Shrinkage appeared not to be affected by the activator type, while the expansion developed after the cooling down phase in stabilized isothermal conditions and did not stop within the duration of the tests. X-ray diffraction analysis performed shortly after the cooling down phase indicated the formation of crystalline hydrotalcite, which was associated with the observed expansion. A mixture with a higher amount of sodium silicate showed less expansion, likely due to the accelerated hydration and geopolymerization leading to the increased stiffness of the binder matrix.

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Hindawi Publishing Corporation, 2019. Vol. 2019, artikkel-id 6903725
HSV kategori
Forskningsprogram
Byggmaterial
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URN: urn:nbn:se:ltu:diva-74369DOI: 10.1155/2019/6903725ISI: 000473368400001Scopus ID: 2-s2.0-85066020513OAI: oai:DiVA.org:ltu-74369DiVA, id: diva2:1322919
Merknad

Validerad;2019;Nivå 2;2019-06-26 (johcin)

Tilgjengelig fra: 2019-06-11 Laget: 2019-06-11 Sist oppdatert: 2019-08-16bibliografisk kontrollert

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